CN202307401U - Permanent magnet water-cooled interval winding rotating magnetic field generating device - Google Patents

Abstract

The utility model provides a permanent magnet water-cooled spacer winding rotating magnetic field generating device, which belongs to the technical field of surface modification equipment. It includes multiple pairs of iron cores and excitation windings evenly distributed along the circumference, magnetic heads and additional permanent magnetic heads installed at their ends, iron core fixing chassis, inner and outer protective covers of excitation windings, heat shields, and cooling water pipes. The lower end of the iron core is fixed on the fixed chassis of the iron core, the outer protective cover and the inner protective cover of the excitation winding are respectively fixed on the inner and outer rings of the fixed chassis of the iron core, and the excitation winding is covered in the cavity formed between them, and the heat shield It is fixed on the upper surface of the inner and outer protective covers; the excitation winding is a coil wound on a multi-layer hollow column, and the hollow column is connected to the cooling water pipe, and the water cooling helps the coil to dissipate heat. By sequentially turning on and off the excitation winding to generate a rotating magnetic field, the structure and performance of the laser cladding coating on the material surface are optimized. It has the advantages of obtaining a high-intensity rotating magnetic field, miniaturization, easy assembly and disassembly, and can be used in a small environment. Magnetization treatment is carried out in the space to meet the needs of magnetization treatment under various working conditions.

Description

A permanent magnet water-cooled spacer winding rotating magnetic field generating device

technical field

The utility model provides a permanent magnet water-cooled spacer winding rotating magnetic field generating device, in particular a water-cooling rotating magnetic field generating device for optimizing the microstructure and performance of laser cladding coatings on the surface of materials, belonging to the technical field of surface modification equipment .

Background technique

With the further extensive application of laser cladding surface modification technology in biology, aviation, aerospace, machinery, materials, metallurgy, mining, nuclear power and other fields in recent years, the microstructure, physical and chemical properties, and Higher and higher requirements are put forward for mechanical properties, photoelectric properties and biomedical properties. However, laser cladding coatings generally have defects such as uneven cladding layer structure, pores and cracks. In order to effectively make up for the shortcomings of laser cladding and give full play to its advantages, in recent years, researchers have proposed a new idea of external magnetic field-assisted laser welding and laser cladding. According to the existing research and reports at home and abroad, the forms of external magnetic fields include longitudinal magnetic field and transverse magnetic field, etc., but these magnetic fields are all static magnetic fields. The distribution of the magnetic field is limited to a certain position in space, and the direction of the magnetic force lines is always fixed. Experimental studies have proved that these static magnetic fields can have a certain impact on the metal flow and crystallization in the molten pool during laser welding and laser cladding, thereby affecting the mass transfer and heat transfer process of the metal in the molten pool, so as to improve its technology. , to improve the quality of the modified layer.

Although the static magnetic field can affect the mass transfer and heat transfer of the metal in the molten pool, the static magnetic field can only affect the mass transfer and heat transfer process of the metal in the molten pool in a specific direction at a certain moment. Therefore, the static magnetic field still has great limitations in improving the process. If a process that can affect the mass transfer and heat transfer of molten pool metal in multiple directions can be developed, it will be very important to further improve the microstructure of laser cladding composite coatings and improve the surface comprehensive properties of laser cladding coatings. Meaning, applying a rotating magnetic field to the laser cladding process is an effective way. At present, there is no report on a rotating magnetic field generating device that improves the laser cladding process, especially a rotating magnetic field generating device with good magnetic field strength and cooling and heat dissipation effects.

Contents of the invention

The purpose of this utility model is to provide a permanent magnet water-cooled spacer winding rotating magnetic field generator, which provides a rotating magnetic field for the laser cladding process, improves the flow and crystallization characteristics of liquid metal, and optimizes the structure and comprehensive surface properties of laser cladding coatings. .

The technical scheme of the utility model is: a water-cooled spacer winding rotating magnetic field generator, including a plurality of pairs of iron cores 2 uniformly distributed along the circumference and field windings 6 fixed thereon, and a plurality of pairs of iron cores 2 mounted on the upper end of each pair of iron cores. Magnetic head 1 and additional permanent magnetic head 14, iron core fixed chassis 5, excitation winding outer protective cover 3, excitation winding inner protective cover 4, heat shield 11, and cooling water delivery pipe 13, the lower end of iron core 2 is fixed on the iron core fixed chassis 5, the field winding outer protective cover 3 and the inner protective cover 4 are respectively fixed on the inner and outer rings of the iron core fixed chassis 5, and the field winding 6 is covered in the cavity formed between them, and the heat shield 11 is fixed on the field On the upper surface of the inner and outer protective covers 3 and 4 of the winding, the additional permanent magnetic head 14 is installed at the end of the magnetic head 1; each excitation winding 6 includes a winding fixed end plate 9 and a fixing nut 7 for fixing it on the upper and lower ends of the iron core , the multi-layer coil fixed hollow column 12 uniformly fixed on the upper and lower winding fixed end plates 9 along the circumference from the inside to the outside, and the coils wound on each layer of coil fixed hollow column 12, each layer of coils is kept A certain distance; the coil fixed hollow column 12 is connected to the cooling water pipe 13 (at the sealing interface), and the cooling water is passed through the cooling water pipe 13 to the coil fixed hollow column 12 to cool the excitation winding 6 .

The number of layers of the coil fixed hollow column 12 is 2-8 layers, each layer has 4-12 hollow columns, each hollow column is a metal column with a diameter of 3-5mm, and the distance between the coils of each layer is 1-3mm , to ensure that there is a certain heat dissipation gap between each layer of coils. The number of layers of hollow columns 12, the number of hollow columns in each layer, and the spacing between coils in each layer are all determined within a given range according to actual needs, so as to ensure sufficient magnetic field strength and heat dissipation.

The number of the magnetic head 1, the additional permanent magnetic head 14, the iron core 2 and the field winding 6 is 2 to 6 pairs, and the interval between each pair of magnetic head 1, the additional permanent magnetic head 14, the iron core 2 and the field winding 6 is 30 ~90°. The magnetic head 1 is a columnar structure (the cross-section can be circular, square, etc.), and there is a gap of 1-5mm between it and the heat shield 11, and each pair of magnetic heads is assembled in a straight line. The number of the magnetic head 1 , the iron core 2 and the exciting winding 6 is determined within a given range according to the actual needs, so as to ensure that a sufficient magnetic field strength can be formed. The cross-sectional shape of the additional permanent magnet magnetic head 14 is the same as that of the magnetic head 1, and its center is coaxial with the magnetic head 1, and every pair of permanent magnetic magnetic heads is assembled in a straight line. The material of the magnetic head 1 and the iron core 2 can be pure iron, iron-silicon alloy (such as silicon steel), iron-nickel alloy, iron-aluminum alloy, amorphous magnetic material, ferrite and so on.

The outer protective cover 3 of the excitation winding is 1-5 mm thick, and has a plurality of cooling holes with a diameter of 1-20 mm on it, and can be made of thin metal plates such as common copper, steel, and iron. The thickness of the protective cover 3 and the number of heat dissipation holes on it are determined according to actual needs, so as to ensure the protection and normal heat dissipation of the winding. The inner protective cover 4 of the excitation winding can be made of heat insulating material.

The magnetic head 1 and the iron core 2 are connected and fixed through the magnetic head iron core connection fixing bolt 10, and the coil fixing hollow column 12 is fixed on the fixed end plate 9 of the excitation winding through screw fit, and the outer protective cover 3 of the excitation winding and the iron core fixed chassis 5 pass through The high temperature resistant insulating glue is connected and fixed, the inner protective cover 4 of the excitation winding and the iron core fixed chassis 5 are connected and sealed and fixed through the high temperature resistant insulating glue, and the heat shield 11 is insulated from the outer protective cover 3 of the excitation winding and the inner protective cover 4 of the excitation winding through the high temperature resistant insulation The glue is fixedly connected and sealed, and the ring-fixed hollow column 12 and the cooling water delivery pipe 13 are sealed and connected by common welding or pipe connection at the interface.

The utility model realizes the rotation of the magnetic field by sequentially switching on and off the power of multiple pairs of excitation windings distributed evenly on the same circumference, and the time interval, cycle and excitation current of each pair of excitation windings can be adjusted separately. .

This device generates a rotating magnetic field by sequentially turning on and off multiple pairs of excitation windings evenly spaced on the same circumference, and can be easily realized by adjusting the time interval and cycle of sequentially turning on and off the excitation windings, as well as the magnitude of the excitation current. The magnitude of the magnetic field rotation frequency and magnetic field strength changes. The magnetic field strength of the device is greatly enhanced due to the addition of a strip-shaped additional permanent magnetic head on the magnetic head. At the same time, due to the hollow structure connected to the cold water pipe in the winding column, the heat dissipation and cooling of the winding are increased, so that the device can work at a greater current intensity, and the magnetic field can reach a higher intensity. In laser cladding Better results can be obtained in the process. By changing the rotation frequency of the rotating magnetic field and the magnitude of the excitation current, the laser cladding process can be improved conveniently and effectively, and the mass transfer and heat transfer process of the liquid metal in the molten pool can be improved. It has the advantages of miniaturization, easy assembly and disassembly, etc., and can be magnetized in a small environmental space to meet the needs of magnetization in various projects and working conditions.

Description of drawings

Fig. 1 is a schematic diagram of the front view of the utility model;

Fig. 2 is a schematic view of the utility model;

Fig. 3 is the utility model A-A sectional schematic diagram;

Fig. 4 is a schematic diagram of the utility model;

Fig. 5 is a schematic diagram of the process of generating a rotating magnetic field by winding 1-1' in Embodiment 1 of the present invention;

6 is a schematic diagram of the process of generating a rotating magnetic field by the winding 2-2' in Embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of the process of generating a rotating magnetic field by the winding 3 - 3 ′ in Embodiment 1 of the present invention.

The labels in the figure are: 1-magnetic head; 2-iron core; 3-excitation winding outer protective cover; 4-excitation winding inner protective cover; 5-iron core fixed chassis; 6-excitation winding; 7-excitation winding end plate Fixed nut; 8-fixed nut; excitation winding fixed end plate 9; 10-magnetic head iron core connection fixing bolt; 11-heat shield; 12-coil fixed hollow column; 13-cooling water pipe;

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated, but the protection scope of the utility model is not limited to described content.

Embodiment 1: Referring to Figures 1, 2, and 3, this water-cooled spacer winding device for generating a rotating magnetic field includes 3 pairs of iron cores 2 uniformly distributed along the circumference and field windings 6 fixed thereon, mounted on each pair of iron cores. 3 pairs of magnetic heads 1 and additional permanent magnetic heads 14 at the upper end of the core 2, iron core fixed chassis 5, outer protective cover 3 of the excitation winding, inner protective cover 4 of the excitation winding, heat shield 11, and cooling water delivery pipe 13, the lower end of the iron core 2 The nut 8 is fixed on the iron core fixed chassis 5, the field winding outer protective cover 3 and the inner protective cover 4 are respectively fixed on the inner and outer rings of the iron core fixed chassis 5, and the field winding 6 is covered in the space formed between them. In the cavity, the heat shield 11 is fixed on the upper surface of the excitation winding and the outer protective covers 3 and 4, and the additional permanent magnetic head 13 is installed at the end of the magnetic head 1. Each excitation winding 6 includes a winding fixed end plate 9 and a fixing nut 7 fixing it on the upper and lower ends of the iron core, and the 6-layer coil fixed on the upper and lower winding fixed end plates 9 evenly along the circumference from the inside to the outside. Hollow columns 12 and the coils wound on each layer of coil fixed hollow columns 12, each layer has 4 copper hollow columns with a diameter of 5mm, the distance between each layer of coils is 3mm, and the coils fix the hollow columns 12 and the cooling water pipe 13 connections. The end of each bar-shaped magnetic head 1 is equipped with an additional permanent magnetic head 14 coaxial with it, and the sections of magnetic head 1, additional permanent magnetic head 14 and iron core 2 are circular, and every pair of magnetic head 1, additional permanent magnetic head 14. The distance between the iron core 2 and the excitation winding 6 is 60°, the distance between the magnetic head 1 and the heat shield 11 is 5mm, and each pair of magnetic heads 1 and the additional permanent magnetic head 14 are assembled in a straight line.

The magnetic head 1 and the iron core 2 are connected and fixed by the magnetic head iron core connection fixing bolt 10, the coil fixed hollow column 12 is fixed on the fixed end plate 9 of the excitation winding through thread fit, the outer protective cover 3 of the excitation winding and the iron core fixed chassis 5 pass through the high temperature resistant The insulating glue is connected and fixed, the inner protective cover 4 of the excitation winding is connected and sealed with the iron core fixed chassis 5 through the high temperature resistant insulating glue, and the heat shield 11 is fixed with the outer protective cover 3 of the excitation winding and the inner protective cover 4 of the excitation winding through the high temperature resistant insulating glue Connected and sealed, the coil fixing hollow column 12 and the cooling water delivery pipe 13 are welded and sealed at the interface. The magnetic head 1 and iron core 2 are made of Q235 steel, the inner protection cover 4 of the excitation winding is made of high temperature resistant heat insulation board, the iron core fixed chassis 5 is made of Q235 steel, the excitation winding wire is made of 1mm enamelled copper wire, and the excitation winding The fixed end plate 9 is made of an insulating plate, and the outer protective cover 3 of the excitation winding is made of a copper sheet with a thickness of 2mm (there are 2000 cooling holes with a diameter of 1mm on it).

The device realizes the rotation of the magnetic field by sequentially turning on and off the power of multiple pairs of excitation windings distributed evenly on the same circumference. The time interval, period and excitation current of each pair of excitation windings can be adjusted individually.

As shown in Figures 4, 5, 6, and 7, three pairs of magnetic heads 1, additional permanent magnet magnetic heads 14, iron cores and windings are distributed on the same circle at intervals of 60°. 2', 3-3' When the power is turned on and off, a magnetic field is generated in the space surrounded by the field winding coil, and the generated magnetic field magnetizes the iron core in the field winding, so that the magnetic force line is transmitted along the direction from the iron core to the magnetic head. The process of generating the rotating magnetic field is that when the excitation winding 1-1' is energized in sequence, a magnetic field is generated in the space surrounded by the excitation winding coil, and the generated magnetic field magnetizes the iron core in the excitation winding, so that the magnetic force line goes along the iron core to the magnetic head direction (see Figure 5). When the excitation winding 2-2' is energized in sequence, a magnetic field is generated in the space surrounded by the excitation winding coil, and the generated magnetic field magnetizes the iron core in the excitation winding, so that the magnetic force line is transmitted along the direction from the iron core to the magnetic head (see figure 6). When the excitation winding 3-3' is energized in sequence, a magnetic field is generated in the space surrounded by the excitation winding coil, and the generated magnetic field magnetizes the iron core in the excitation winding, so that the magnetic force line is transmitted along the direction from the iron core to the magnetic head (see figure 7). According to the characteristics and technological requirements of the solidification and crystallization process of the laser cladding molten pool, three pairs of excitation windings can also be energized at the same time or any two of them can be energized at the same time.

Embodiment 2: Referring to Fig. 1, 2, this water-cooled spaced winding rotating magnetic field generating device is the same as Embodiment 1, the difference is: there are 6 pairs of magnetic heads, additional permanent magnetic magnetic heads, iron cores and excitation windings, each pair of magnetic heads, The distance between the additional permanent magnetic head, the iron core and the excitation winding is 30°, and the distance between the magnetic head and the heat shield is 3mm. Each excitation winding has 2 layers of coil fixed hollow columns, each layer has 12 steel hollow columns with a diameter of 3mm, and the distance between the coils of each layer is 1mm. The material of magnetic head and iron core is silicon steel, and its section is square; the outer protective cover is made of steel plate with a thickness of 5mm, and there are 500 cooling holes with a diameter of 20mm on it.

Embodiment 3: Referring to Fig. 1, 2, this water-cooled spaced winding rotating magnetic field generating device is the same as Embodiment 1, the difference is: there are 4 pairs of magnetic heads, additional permanent magnetic heads, iron core, additional permanent magnetic heads and excitation windings , The distance between each pair of magnetic heads, additional permanent magnetic heads, iron core and excitation winding is 45°, and the distance between the magnetic head and the heat shield is 4mm. Each excitation winding has 4 layers of coil fixed hollow columns, each layer has 8 copper hollow columns with a diameter of 3mm, and the distance between the coils of each layer is 2mm. The material of magnetic head and iron core is ferrite, and its cross-section is circular; the outer protective cover is made of copper plate with a thickness of 1mm, and there are 100 cooling holes with a diameter of 10mm on it.

Embodiment 4: Referring to Figures 1 and 2, the water-cooled spaced winding rotating magnetic field generating device is the same as Embodiment 1, the difference is that there are 5 pairs of magnetic heads, additional permanent magnetic heads, iron cores, additional permanent magnetic heads and excitation windings , The distance between each pair of magnetic heads, additional permanent magnetic heads, iron core and excitation winding is 36°, and the distance between the magnetic head and the heat shield is 4mm. Each excitation winding has 8 layers of coil fixed hollow columns, each layer has 6 copper hollow columns with a diameter of 4mm, and the distance between the coils of each layer is 3mm. The magnetic head and iron core are made of iron-nickel alloy, and their sections are square; the outer protective cover is made of copper plate with a thickness of 3mm, and there are 1500 cooling holes with a diameter of 3mm on it.

Embodiment 5: Referring to Figures 1 and 2, the water-cooled spaced winding rotating magnetic field generating device is the same as Embodiment 1, the difference is that there are 2 pairs of magnetic heads, additional permanent magnetic heads, iron cores, additional permanent magnetic heads and excitation windings , The distance between each pair of magnetic heads, additional permanent magnetic heads, iron core and excitation winding is 90°, and the distance between the magnetic head and the heat shield is 1mm. Each excitation winding has 3 layers of coil fixed hollow columns, each layer has 4 copper hollow columns with a diameter of 3mm, and the distance between the coils of each layer is 2mm. The magnetic head and iron core are made of iron-nickel alloy, and their cross-sections are square; the outer protective cover is made of copper plate with a thickness of 2mm, and there are 1000 cooling holes with a diameter of 5mm on it.

Claims (7)

1. permanent magnetism water-cooled winding rotating magnetic field generation device at interval is characterized in that: comprise along circumference equally distributed many to iron core (2) and cover solid on it excitation winding (6), be loaded on every pair of iron core (2) upper end many to magnetic head (1) with additional permanent magnetism magnetic head (14), iron core fixed underpan (5), excitation winding outer protective cover (3), the interior protective cover (4) of excitation winding, thermal insulation board (11) and cool off water-supply-pipe (13); Iron core (2) lower end is fixed on the iron core fixed underpan (5); Excitation winding outer protective cover (3) and interior protective cover (4) are separately fixed on the Internal and external cycle of iron core fixed underpan (5) and with excitation winding (6) and cover in its cavity that forms each other; Thermal insulation board (11) is fixed on the upper surface of the inside and outside protective cover of excitation winding (3) and (4), and additional permanent magnetism magnetic head (14) is loaded on magnetic head (1) termination; Excitation winding (6) comprises winding fixed charge method end plate (9) and is fixed in the hold-down nut (7) of iron core upper and lower end; Evenly be fixed on the lattice coil fixation hollow column (12) on the upper and lower winding fixed charge method end plate (9) from the inside to the outside along the border and be wound on the coil on every layer line circle fixation hollow column (12); Keep a determining deviation between every layer line circle, the hollow column 12 of coil stationary is connected with cooling water-supply-pipe (13).

2. permanent magnetism water-cooled according to claim 1 is winding rotating magnetic field generation device at interval; It is characterized in that: the number of plies of the hollow column of coil stationary (12) is 2 ~ 8 layers; Every layer has 4 ~ 12 hollow columns; Every hollow column is the metal upright post of diameter 3 ~ 5mm, and the spacing between every layer line circle is 1 ~ 3mm.

3. permanent magnetism water-cooled according to claim 1 is winding rotating magnetic field generation device at interval; It is characterized in that: the quantity of magnetic head (1), additional permanent magnetism magnetic head (14), iron core (2) and excitation winding (6) is 2 ~ 6 pairs, every pair of magnetic head (1), add permanent magnetism magnetic head (14), iron core (2) and excitation winding (6) be spaced apart 30 ~ 90 °.

4. permanent magnetism water-cooled according to claim 1 is winding rotating magnetic field generation device at interval, and it is characterized in that: magnetic head (1) be the bar column construction, itself and thermal insulation board (11) interval certain interval, and the opposed assembling that is in line of every pair of magnetic head.

5. permanent magnetism water-cooled according to claim 4 is winding rotating magnetic field generation device at interval, and it is characterized in that: the gap between magnetic head (1) and the thermal insulation board (11) is 1 ~ 5mm.

6. permanent magnetism water-cooled according to claim 1 is winding rotating magnetic field generation device at interval; It is characterized in that: additional permanent magnetism magnetic head (13) section configuration is identical with magnetic head (1), and its center is the opposed assembling that is in line of coaxial and every pair of permanent magnetism magnetic head with magnetic head (1).

7. permanent magnetism water-cooled according to claim 1 is winding rotating magnetic field generation device at interval, it is characterized in that: the thick 1～5mm of excitation winding outer protective cover (3) has the louvre of a plurality of diameter 1～20mm on it.

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